Toggle (i.e. activate/deactivate) a java swing button

[Zulfi Khan]

Hi,
I have written the following code:
private void savAccRBActionPerformed(java.awt.event.ActionEvent evt) {          
                               
        // TODO add your handling code here:
        if (btnCalInterest.setEnabled(true))
            btnCalInterest.setEnabled(false);

I am getting the incompatible type error.
Somebody please guide me.
Zulfi.